There are a few providers that specialize in this market:

* RockBochs, Inc. (http://www.rockbochs.com)
The leading provider of VoIP and Fax in the satellite industry. RockBochs offers the most cost-effective fax-over-satellite service in the world.

* WiredSkies. (http://www.wiredskies.com)
Efficient VoIP and 100% reliable faxing over satellite links using proprietary SkyWire convergence routers. Unique protocol combined with excellent compression using optimized speex codec results in only 5 to 8 kbps per call with units that provide up to 24 phone lines. Systems will work over even the worst satellite links including Hughes and Wildblue. Only provider to support fax over satellite and guarantee reliability. Phone numbers (DIDs) available in every US area code and in most countries. SkyWire routers also provide IPSEC and SSL VPNs as well as aggressive bandwidth optimization through techniques such as network level web caching, traffic shaping, and compression.

* SunISP (http://www.sun-isp.com)
VOIP and Internet Satellite have converged to become VOIP over Satellite. Sun-ISP is a Satellite Internet and VOIP provider serving the global market. Satellite internet and VOIP or Satellite VOIP has riled much skepticism to quality due to packet loss. SunISP was founded with the goal in mind of replacing this skepticism with crystal clear VOIP over Satellite to many Satellite users. Hughes and VOIP over Satellite work perfectly because our system has been configured to run on only 16Kbps of bandwith unlike other providers. Starband and our VOIP Sattellite along with Wild Blue Satellite VOIP work perfectly as well with minimum latency or delay. VOIP over Satellite is the ultimate solution to rural communities as international countries with limited dedicated infrastructure. We are a friendly VOIP over Satellite as well as standard VOIP company who ensures that a welcoming voice will answer on the other end when dialing for Support.

* Ground Control(http://www.groundcontrol.com), VOIP for Direcway or Galileo users
* SatEuro.com VoIP enabled satellite Internet services. Worldwide coverage
* Skycasters (http://www.skycasters.com) VOIP for Directway users
* SDN Global (http://www.sdnglobal.com)Satellite VoIP over dedicated international MPLS backbone with full QoS. Global redundant teleports utilize 7 satellites to cover 95% of populated world. BroadSat®, RecoverSat®, and JobSat® line available for Retail, Utilities, Oil & Gas, Distribution and Logistics, Health Care, Publishing, Financial, and Mining industries.

* Speedway (http://www.speedway.com.mx) VOIP for iDirect and Linkstar users
* Transcom ISP(http://www.transcom.co.uk) VOIP for any high contention VSAT systems

* Agiosat Global Communications (http://www.agiosat.com)
VSAT/Mobile/Emergency communications, including VOIP. Global coverage.

* BusinessCom Internet via Satellite (http://www.bcsatellite.net)
VoIP and VSAT services based on the LinkStar, iDirect and dedicated backbone channels with appropriate QoS setup. Service is offered on a unique iLBC codec which is used in Skype to achieve the best radio frequency media tolerance.

* atrexx (http://www.atrexx.com)
Global Capacity and Facility Exchange Versatile Voice-over-IP System proved with DSL type broadband connections and Internet over Satellite connections
source : http://www.voip-info.org

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The powerful mini-VSAT Broadband service is available via the rugged, 24" (60 cm) TracPhone V7 antenna. A fraction of the size of standard 1-meter VSAT systems, the TracPhone V7 and its fully integrated below-decks modem and control unit offer easy connections to shipboard networks, fully stabilized tracking, a remarkable reduction in the cost of hardware and installation, and all with no compromise in performance!

The revolutionary TracPhone V7 and mini-VSAT Broadband service makes your vessel more productive – you can send and receive e-mail, access company networks, download chart updates, use the enhanced VoIP telephone service for ship's business and add the optional crew calling system to help your crew stay in touch with their loved ones. This new product and service, developed by leaders in the satellite communications industry, is exactly what you’ve been waiting for – it's what broadband at sea was meant to be.

Customers who demand an enterprise-grade fax solution should take advantage of KVH's optional accessory - the UCH-250 Fax Server.

In addition, when you activate your system, you also get FREE access to KVH’s Velocity™ Acceleration software. When installed on your PC, this software optimizes and speeds up your data connections via the mini-VSAT Broadband service.

If you need to switch easily between multiple TracPhone satellite communications systems, KVH also offers an optional Service Selector. This simple solution allows you enjoy the benefits of both the mini-VSAT Broadband and Inmarsat services when you need them.

For more information go to http://www.kvh.com/

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